Electrical apparatus



May 27, 1930. H. A. THOMPSON 1,759,923

v ELECTRICAL APPARATUS Original Filed July 6, 1928 :5 sheets-sheet 1 Ma27,1930. A TH PS N 1,759,923

ELECTRICAL APPARATUS Original Filed July 6, 1928 3 Sheets-Sheet 2 y 27,9 H. A. THOMPSON ELECTRICAL APPARATUS Original Filed July 6, 1928 3Sheets-Sheet 3 QM 'DIID HNGGGG BSQLQ r 3m k 0 m h mk Q N WE QQ Cw QmLLEOR :HJLThompsoo,

't Ehe preent adppiioationiee"tlii ieion'of gownnniA.mnioivxisoiilfor;nnqnwoon no UGIiQ EK SYL A A,issmnoii mo131ml UNIONSWITGH 8;slqtT An corvu z my;onswlesxmnn,,P NSYL NI A'oomeolm: M

i Firm 9? 33 M YANIA- My in'eni-ionlates ialec tfi pp tlie} and is1oatrtioulztfly aid alptd. fen, though in no ay limitedfto railway,treffie controlling .apparatn;

co-pending application,Serial No; 290,789,

.-fi1ed Jn1y'6, 1928,ifoi' eleet ica'l appdmtus. f

Ifwillrleisoribie one form of a paratus em v "bodyin'gl my inventiomfind'"will"then-point out the novel featnresflthereof 'clztiins,

In the accompanying "draWingg-i Eigs 1, '1 and 1 are diagrammatievijews-which fwhenp'lewd endto end* in"the ordermmed; show one foi-in ofapparents-embodyingmy showing 'the'ph ese nelationsknnd'poljarities ofinvention. Figs, 2 to '11,; inclusive; are Views [the eurients inwindings ofithe rna gshwn i "Referring fir st to Figs} 1','. 1* and 1',there'f erence characters 30/ and 30 1 designate the 7 which trafficnormally nioves in the directions" indicated by the arrows. ;'l;heserails-"arexdiiJ viided by'insulatedi joints' 2into;ajilui ality of track"sections 'Af B; B C; C TD, D E, v e ningnieans of any desired type. vAs lizrti f Ea ch track sectionfisu-provided with g two 1 7 traek relaysdesignatedflby" the reference fehai'ziote'rs -H-and}.Klwithjjapprlopriete ex v t pon'ents,e'ach"of Which-relays'ooinpisleSitWO track milsof a etret' ch of 'railway track along relaygH,Kfon'eaohection 'faieigonneoted.

" directly tcrosjs the {track 1rei1sfadjfzteent the a transformerlesigfitte cl b' the ref'erence I entrance end of the section;andftheiwindings Glareconstantiyeonnected with the secondary cha'moterL'With anlexponen coit esponding the drawings; ,lntljpos ed between'thewind the associated ,trans fonnei t L is an asym- Ineti'iounit 34, a; second zt's ymn 'etifi cl L n'it 7 being connected ac' ossthef terminals of the v relty; In"Sim'ilarmannerinterposed between theWinding-'6 of each relay and theseo" ondary Ofthe associated transformerL is an I V asymmetric unit186gian'as'yrnmetiicunit-,3? i I I I 7 fbeing conneeted acrossthe terminals of the through Contact 51-51? ofnelay K eonta'et ABP ARAT US S is 1ighted, the ciruit for'thislamp-pass? ingfrom the i'ighbhand terminal" of'the 'seb'fl ondaryoftransformer L over contact j :45? of 'relayjH Contact 55f5'5 or relay KWinding 6 is supplied only With haIf-Wavesof one O,01su."it'yan'di'ltheparts are 'so-pi' opfori, tioned thatjcurrent flows in onedirection I 7 through Winding of each relay H in Ed y. Mi-11 b laintheie'f fe,that-"eaten the same direction but? of opposite. "phasethrough windingfi-of each relay'K. ItJfoI- lows fthet full-Wavealternating 'on'rrent in the: track rail s willfenergize";relays'l-l.and K nopposite directions. The-cnrrentsi'in-wind=f Inge-f relaysI-I and-Kare illust 'ated rijn Figs. Za'nd 3'',respectively,

Eaichftmcksection iselsoprovidctwitlf V two transformers des ignated bytherefeitenoe character s vVfandT,respectively;with i tin'gnisl ingexponents correspondingto the Y 5' location.)Theftransforrnens viandloperate" V tosll'pplyjicurrent togthe track rails ofjthe. 5* 5assoeiatectsection" froin the adjacentl trans 1 i-thetwolrelays' H and,K for the section next, 4 in advance andygwhich will be describedformer Lin aniannen which is Controlled by:

detail hereinaft i eectiion may also be need to control traffic gov-fshown, these tr'aflie governing means "aire'in the form of waysidesignals, one located atthe entrance end of-ea ch section and designatedby thereference ,schlai' aoter S- With-an ex 7: ponent oorresponding-tothe location. E ch 3 signalindicationWhenen'ergiZed; i

7 As 'siho'wx'rn in the drawing; the section v iin mediaitely totheifright ofthe'f-point Q is 0G- therefore ole-energized and lamp 58 ofsignal andlarnp 58o)? signal S baek--to theinid point of the secondaryof transform-er *LQQ Whiohdnay be traeedfroin the night-han'c i 7 Underthese conditions; also, a circuitie 00m: i pleted foi the primaify27of-transformer T9]- I j secbndarygeftransformerlL The secondary Withtlje t-ra'ckrails TOver "a'lci reuit' which: 'be' traeedfrom theright-hand terminal "of -this,seeenclaryg threugh nn e'deneeQ-S, con-r,f nla K ndjasymmetric n w.391tQ' rai1130f I I I H j clreuit' of Itransf rmer T is new cenip'let'eci Igfrjern the left hand terminal"o'fgthe secend'ary' T7 :1 zi i i niiii tr scr he la: lten a l i -w flt9f norrnal relative phaseiis supplied te thera ls a :rransforme T9 onlythe ipois itive ihalf-waye of this Current VOW; e s f l n V :P+.Q,zasshownjn Fig I v I I I I I 'jing'current of normal relative 'phase S PP linithe nornial direetien bnt' thisj current does -'netlenergi-ze IIfGIrIYQH- because t flows allows its contacts to' assume their middle p lamp59 ofsignal is?ever centaet -45710f former ,T back to the-rnidppint e fsec ondary ofltransformer 'LFQThG' se'condery ithejrails of sectien'thro igh impedance L 1 4 b' y KT-81n asym etr nit 8 rails of sectionM51 are thereferejsup 1 1 fplie'd with enly the' negative halflwaves ofThis; curr I I thereverse' directionby thecur- I rent flowing::s'ectienjM 'P. A eirc'nit is completed" for" lamp 601 of signa1f -Sfover,-

i tact 51%5'1 ofrelay KM; Contact 43+43P=0f I relayj and prirnar'yQfToftransferrner -.b aek"te mid-i'point. of the fse'eondaryef transi"-f0rmer L 5 Thesecendary 26 of transformer "HT! connectednwith therails ofsection F 1M kw V 43,'43 of relay :I-IIQQ' an d primary- 27 oftrans-f the positivehalfiwavesef alternating current I51 'fermer I backto the, mid-point; or the,

v i f gram, Fig. 6.. 26 ofthe transfermerT f isl'inew 'conneeted I V gized in the normal direction, but relay KF R sectibn-baek tothefle'ft-handfterminal Qf see; I

ondary 26 oftran'sforinerT f Under the c0115 I v H I I I I V I I I relayK5, contact 43+4 3 of relay f sprimarym ef transforrner .T back tofthe';of seetionP Q hut";sinceiasyn n etrie unit" I :39 is interposed.- -in"the jseeondary circuit of.

"contact efsrelaygHFiancl- Contact -50 ofrelay K f. ItwillwbeinotedithatE a R fgrringnowjtothe apparatnsilocatedatf 'pointP, thepositive 1half-Waves of alternab I :.t0--Itherai1s"ofisectioniP Q, ene g e ya I II supplied to the rails of seLctiohE-Q-F asshqwnu yii'1-1F1Ig.7.v I iduring the' intervals that'r'iwindin g 6 0f relay; -H is "degenergized,s d tha't' the latter relay; II I I I I I I I i I I I CtIOn energizesrelayfHE in ythe' sitien s'. naming therefore cbfiipleted'for "1 01 1 Imd energiZesLrelayfKF in is closed forthe primary'27 f transformer? Ifrom the left-handiterminal' Greb -sew 43+43 lof relay H and' primary27bftra'nsfa I ;52,52" of relayK ,c lt&etA3 43? of relay I andpr1mary27oftrans'forme'r Tgtofthe 260i transformer T "isinowonneeted with'Q I I II I may be traced from the right handiternnnal I alternatingenrrentiefreverserelative'phase,

e'ntis' shown diagrammatically in I I I I II I I I I YIII'JIINQ'The'secpndary,260i t-r ansfor'rner T irisn03 energize but rel'ay K fisjII I I I I I contact 42%2' of relay H 3, eentact 50 rreverse relativephase are therefore supplied f. t0 the railsof seetionDfEi fFurthermer'e theseeondary 32 of tgansfqriher w isjc'enitransformer Tfrom the left-hand terminal iasymmetrie unit 69; With' rai1slof'gsection"Thev pesitiye half waveswf alt'erna:

fore alsesn'pplied to thera'il'sfofsection- D;

resented by 1 the diagram,;;-Eig'. 8

' aver a eirenit including impiedance 28,rc ontact I I I I I iAtpomt1),. reiaysH and IQ "arei betl efj-sectien are new supplied; with pnlyxof reverserelative phaseasshewnin thejdia- V V Atlpointi F," therefereerei ay H emf-J 7 I is 'de-energizedi Under. thesejconditibns, a;circuit is completed, to'light lamp 6110f signal S? over contactA5 -l t5ef relayfiHFland j Contact 56%56 of relay K T. The" iirimary oftransformer L over Contact T 52'"f52 j of 'I mid-pointer theseeendaryf'of transformer The secondary QG' Of transfOImer T is isconnected with. the'railsief sectien E;F i03zer i 1" neither ef' theasymmetric :units 38 er 39 'at a point .F i s included infthe secondarycircuit: forfltransfermer'T sor that fuii-w'averalterk I nating'"currentjofvreverse relative phase is r Tr Qonsidering p'olnt E,the'cnrrent' no flowing in theirails the reversedirection} solthat aeircni tis-mmi pleted-for 1ani'p' 62bfsignaLS evereontaetl"; I @5 45 ofreIa'y gH and eont'aet '5,6, i56 (if I I -2 relay -K -'.Fnrthermore,laifprilnary ,cir uit'f l x5 Tondary of transformer: LEIOverTfcOritactmid-point of the secondary 6f transformer mary '33 of 'trans fOrmer Vwhich circuit of the secondaryef transferrner LE th'rongh- Of relay Hand priinary 33'l0 f'trans f0rnije v baek toi-the :Ini'dpeintofseeendary j connected with'the rails ofsectieniDr E on 50 9f relay Kjand asymmetrie unit 89, a a pos tive halfaves ef alternati'ng.currentot I neeted' throughimpedance QOQfcjCntact 415%;41 of relay HE, contacti'i 'l iofrelay, KP; anti 1 in}; Current or normalrelatite phasearethere and the current in this 'seetienfm'ayi heL energized inhthe normaldireetienj; andaicir enit is completed for ailamp L 63 pfiiis ifgnal" Sovereei taet fi efiie-ofrelay'H and contaet '1 5%56 of relay KK"Theprimary" circuit foi'trtiifsformer IQY-maybeti aced 130 111 theright-timid. termiiiiljiof the I secondary of V tfra isformei'i Lthreiighfielontaot} 52*52 of relay KP, contact E43+t3 :of retail-P, Iand primary '27 1 of tra sformer I? back to the micl p'oint ofthe"see-e11daji fy fof traiis'foi inef IRE 1 The see'ofida'ify26' ofti'efis foriiiee T ds I I 110W Connected with the' railsof meow-(3 Dthrough impedance 28 ,je01'1t2tb1t fEQ-a'fi? ef rejiay HRoo'ntatt5e+50wre1a1y K9; and, asymmetrieuniti38." Theyrmis of 's'eetion e -C]){are therefore suppli'edw'vi-th' the negative iitlff-wave'sfofaiteriieting cui'ient of nefre iiielieletiiie phase as irid'ieted in-Fig, {9. V,

fTlie oujrrentthus suppliedto themes of Ve Ese'Gir'eQti n', but'relayKP- is tie-energized,

V sle eon'dziry transformer L OiZeroenttet of transformer L Current isalso supplied fto the pfin a ry ofti' ansforiiiei V over weir- V emitWhiehiney "be tmeecLi'fom the left-hand former] T isfnow icoiifi'ectedto terminal 16f the seeehd'alry' of trmejsformer'f L932 I'throughcoxitkict 562%54? 6f" relay-1K, e n:

tzict 44 449 of relay {1111c trensformei 'V beck-t ""tl metric unit 38;Furith'erriioi efihe secondary 32 oftransformer V is new reon eeteglwith the rails of sectio'h'BC oif' ""eohta'ct 40-40 asymmetric unit The"-'r1i1s{i;of section B,'C are therefotefsupplied. with "only: the

v ei natii gfcurrente of 'bothenormaliand Te e' "e pi eses as 1ndi-'gative half-waves of alt caite diby F i glylO.

s n -"1 W h: pi r tiu t ein B, the currentxthussupplied 130th?) rails'ofsection B 0 energizes both i relays H? end K 'inflthe reverse direction,and fal circuit; is Y Y then completed for lamp 65 5f; sigxialSB overContact 45 45 of relay HP-ancl loontact 57- 57o1-e1ayKe -primziry 'eirciit is closed i for transformer T from the;'ri h-t-iian ct-tel v iiiinalof the secondaryof'transformer L3,

throiigh Contact4 3 43'oflrelay fi andp rimary 27- of trans'forinenT ftothe {mid-po nty pm ary ee of is 26p tfa snew? su p o i the: rails ofsectio 1A w-11inFi a 11.; I 7

t-ion A -B energizes: relay H in the reverse direction and energizesrelay K in the; normal direction: Acn cuit is thus completed I 1Guri'ent thus supplied"to the -rails:of see is foi lamp. 66 of signalSovercontaet 45-45 7 this section are "supplied With full-wavejalterneting current of normal re1ative ph2ise. It; wilt seen from theforegoing with the arrangement T of. apparatus shown in F '1,

of reiay lI end contact 5'i 57lio-f ma m; 1 I Primary 27 0f transformerT eis now 0011- ne'etecl 'withthe right-hand portion of the L secondaryof transformer L over "contact 43 43 'of,re1ay H The secondary 260itransformer? T is'eonne'cted, tl roligh'icori taet:42u42 of relay; Hand-contact 49%49 j of relayK 'dire'otlywith the mils of the section tothe leftof point A so that the rails of 5 la ly ,1 h provided a systemf'of rai'i- Way s-i'giielingin which nine se arate mid distinctiiiciic'ations are available'with'out the necessity of providingline-WiresbetWeenle-E I; o 7. V I It should be vpom-m61mmthat althoughI; i

cat-iensh tve'iHustmted 'felat'ysTI and K' as three-posi tion, itwe-e'lement re1ays,' the functions of;

these, partseeuhi equally well be-performed by two-positieiireiay's ofthe usual neutral;

type,-;the necessary mociifieations of thecir v i Quitsbei'h'g'obvious-from theirispectie 1 01"."

3 the drawing, without further explanation. it

Although have 'herei ii skews, anddee seribed oiily one term 01:electrical apparatus or embodying' m invention, it is understood 1thativ ai'ioes Changes and modifications maj be made therein within thescope of the ap p fidd "claims Without i spirit antiscope 10f my inventiaving thus d'eseribed niy 'invention', fJlaimisli? I 1 p nmmtimiemitworelayseaeh having 1 I ti'vo windingsewd each beingselectively ire sponsive to the phase relation ef: currents-findeparting from the V one ftv'indiirgj of eachfelay with only half theieniftining Wiifdifigsjtvith only the pa iwith" ff tiflgw avealternating current of nornliai oif i everse phase of With onlythepositive: J i or only the negative haiflweves of alternate ingettrrelntsof both normal and. reverse i'ela by said, relays; 5'

. 'c m ine i ei. ley h v n -We windings and selectively respons ve tothe 5 tivephese, anctsignaling-means Controlled 1 phase relation of thecurrents in said xvii id;

ings, 'means forvi coiisteritly supplying. ope Winding with onlyhalt-Waves of alternating currentof enereIative h aSeQmeens for slipplying the rema nin w ndi ithm y' th 3? f (110 itswinaingshieensforvconstantl-y supplying

